Improvement in parlor-skates



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` IMPROVEMENT IN PARLOR-SKATES.

' Specification forming part of Letters Patent No. 103,346, dated May24, 1870.

l To all whom it mag/concerm Be itjknown that`I,-`J0HN LEMMAN, ofGincinnati, Hamilton county, State of Ohio, have invented certain;4new..V and useful` Improvementsin Roller-Skates; and l hereby declarethe followiizlglto` be a sufciently full, clear, and exact descriptionthereof to enable one skilledin lthe lart.` to which my inventionappertains to make andjuse, it,` reference being hadf` to theaccompanying drawing, making part of thisspecilication. A

My invention'. relates to the class of broadbase roller-skates therollers of which are adjusted to turn curves by the natural inclinationof the body in skating curves; and my invention consists in theprovision of ball-andsocket joints. connecting the roller-frames to thestock ot the skate, which device, in connection with pivoted leversattached to the sockets,enables the stock of the skate, by rolling inthesockets in obedience to the motion of the body ofthe skater, to soadjust the rollers as to compel them to follow the di` rection desiredbythe skater.

. My invention further consists, in connection withthe ball-and-socketdevice' for the rollerframes of a ilat steel spring, in connecting thetwo roller-frames together in such amanner that the roller-frames willbe returned by the spring to the central position after being adjustedto turn or describe curves.

In the accompanying drawing, Figure l is a perspectiveview of aroller-skate embodying my invention. Fig. 2 is a longitudinal section ofthe same. Fig. 3 is a plan of the under side of the skate, showing theposition of the rollers and frames in describing curves. Fig. 4 is atop-plan view of one end of the stock. .l

Thefoot-stand or stock A of the skate is formed withdownwardly-projectin g spherical segments ct a', which arehconcave onthe upper side, as shown, leaving a uniform thickness of: metal betweenthe convex and concave sur- The stock is secured to the foot of theskater by straps B G or any other preferred method. l l

Therollers, which are preferably four in number, are journaled in theframe D D', in the manner shown, in such a way as to permit of thewithdrawal of the axles for lubrication.

Ihe frames D D are concave on the upper side to fit over the sphericalsegments a a', forming what is known as ball-and-socket joints.77

The frames Dl D are also formed with projectin g levers d d', whichareloosely connected Yto the stock A at E E or F F by set-screw pivots G'G.

The levers d d are slotted, as shown, to permit of the changing of thepivots G G from E E" to F F', in order to diminish the divergence of thelevers from the center line of the stockwhen the stock is tilted. l

The frames are connected to the stock A, at thecenter of theball-and-socket joints, by setscrews HYH, the stock being slotted acrossas shown in Fig. 4, to permit the lateral adjustment of theroller-frames.

A spring, I, is fitted into the slotted projections J J' oftheroller-frames, which serves toreturn` the frames to the central positionafter being forced bythe rolling of the stock A into positionfor curves.This provision is not essentially necessary, as the skate is completewithout it 5 but it is preferred by some skaters, as it preventsshackling In the operation of this skate the center of the concave ofthe rollerframes D D is in line with the center line of the stock whenskating straight. When skating curves the stock A is rolled or tilted bythe necessary inclination of the body for curves, and both frames D Dare forced, by the action of the ball-and-socket joints, to the side ofthe skate on which the body leans. The ends of the levers d d beingretained by the pivots Gr Gr in the center line of the stock, the axlesof the rollers are necessarily twisted or cramped out of right angleswith the skate-stock and compelled to assume the required position for acurve, the degree of adjustment, of course, always depending upon theextent to which the body of the skater is'inclined, as in other skatesof this class.

It will be seen that the oscillating frames D D' are not connected tothe stock by small pintles or axles, upon which all the strain issustained, as in other skates with tilting footboards, but theconnection is broad and Solid, with the best known form for wearingsurfaceviz., ball and socket.

Claims.

1. In connection with the stock A, provided with spherical segments a aand, pivots G G', the concave rollerframes D D d d', combined, arranged,and operating substantially in the manner and for the purpose specified.

2. In connection with the oscillating rollerframes D D J J', theprovision of the spring I, connected and operating in the manner and forthe purpose described.

In testimony of which invention I hereunto set my hand.

JOHN LEMMAN. Witnesses:

FRANK MILLWARD,

EZRA COPE.

